The answer you don't want to hear is probably not. In my experience trying to buy Campag spare parts in Australia is difficult even when they're listed in the catalogue.

Other than ebay, if you are in Melbourne, Abbotsford Cycles do repair Campag gear, they could give you a better answer. Alternatively Bicycle Recycle sometimes have Campag gear from stacked/stripped bikes.

As a last resort email Campag's Australian distributor in Sydney. Very hard to get them to reply.